monarch

    mon·arch

 noun

1.a hereditary sovereign, as a king, queen, or emperor.

2.a sole and absolute ruler of a state or nation.

Longest serving Monarchs

King Bhumibol Adulyadej aka Rama IX Reign: June 9, 1946 – present (67 years)

Born: 5 December, 1927

Queen Elizabeth II Reign: February 6, 1952 – present (61 years)

Born: April 21, 1926

Tuanku Abdul Halim Mu'adzam Shah, Sultan of Kedah and Yang di-Pertuan Agong

Reign: 14 July 1958 – present (55 years)

Born: 28 November 1927

Sultan Hassanal Bolkiah Reign: October 5, 1967 – present (46 years)

Born: July 15, 1946